JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 



237 



Back, greenish; rump, greenish; cheeks, yellowish; sides, show- 

 ing more or less dark streaks. Dendroica virens. 



Black-throated Green Warbler. 



See No. 321. 



PART 6- The following species have the throat yellow ; belly, not 

 yellow ; no white on tail feathers : 



Throat, bright yellow; shading to 

 whitish or olive on belly; forehead and 

 sides of head, black (male ) ; no black 

 on head (female ) ; wing, not longer 

 than tail. Geothlypis trichas. 



Maryland Yellow-throat. 

 See No. 332. 



Throat, showing faint tinge of greenish yellow; throat and sides 

 of body, nearly same color ; wing, considerably longer than tail. 



Vermivora peregrina. 

 Tennessee Warbler. 

 See No. 308. 



PART 7- The following species have the throat, not yellow ; belly, 

 yellow; and no white on the tail feathers : 



Head, grayish; back, olive green; belly, bright yellow; throat, 

 blackish (male); throat, grayish (female); legs, pale; tail feathers, 

 olive green; under tail coverts, yellow. Oporornis Philadelphia. 



Mourning Warbler. 

 See No. 331. 



Back, grayish brown; belly, faintly tinged with yellow; under tail 

 coverts, yellow. Dendroica palmarum. 



Palm Warbler. 



See No. 324. 



PART 8. The following species have no yellow on the throat or 

 belly, and no white on the tail feathers : 



Wing, less than 2.25; under parts, whitish, tinged with olive on 

 sides; throat, with faint wash of yellowish buff, almost white; crown, 

 dull olive; tail, entirely olive green. 



Geothlypis trichas (young bird in fall) . 

 Maryland Yellow-throat. 

 See No. 332. 



